I downloaded every single term, one by one, from the LC linked data site [unfortunately I couldn’t find a way to bulk download LCGFT as MARCXML records], then I added an 072 field [often several] to every single record indicating which hierarchy it belonged to. Add a little XSLT to transform it into a visual display and we’re off to the races! I also added a bit of interesting statistical data, because who doesn’t love that.

Anyway, maybe you’ll find it useful, maybe you won’t but there’s at least one person who wanted it — so there we go!